我以模态UIImagePickerController呈现用户的照片，并看到来自PhotosUI的崩溃 - 这是我的错吗？如果全部是UIKit CoreFoundation＆amp; PhotosUI（iOS 7.1）？
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary])
{
_libraryPicker = [[UIImagePickerController alloc] init];
_libraryPicker.delegate = self;
_libraryPicker.allowsEditing = YES;
_libraryPicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentViewController:_libraryPicker animated:animated completion:NULL];
}
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
//
}
致命异常：NSRangeException * - [__ NSOrderedSetM objectAtIndex：]：超出边界的索引300 [0 .. 299]
Thread : Fatal Exception: NSRangeException
0 CoreFoundation 0x0000000183506950 __exceptionPreprocess + 132
1 libobjc.A.dylib 0x000000018fa0c1fc objc_exception_throw + 60
2 CoreFoundation 0x000000018347f820 -[NSArray indexOfObjectIdenticalTo:inRange:]
3 PhotosUI 0x000000018b113b2c -[PUPhotosGridViewController assetAtIndexPath:]
4 PhotosUI 0x000000018b11fe80 -[PUPhotosGridViewController collectionView:shouldSelectItemAtIndexPath:]
5 UIKit 0x0000000186715204 -[UICollectionView _selectItemAtIndexPath:animated:scrollPosition:notifyDelegate:] + 196
6 UIKit 0x0000000186714d5c -[UICollectionView touchesEnded:withEvent:] + 448
7 UIKit 0x00000001866735f8 forwardTouchMethod + 268
8 UIKit 0x00000001864c1e0c _UIGestureRecognizerUpdate + 5032
9 UIKit 0x00000001864ffb20 -[UIWindow _sendGesturesForEvent:] + 1012
10 UIKit 0x00000001864ff230 -[UIWindow sendEvent:] + 828
11 UIKit 0x00000001864d0b68 -[UIApplication sendEvent:] + 256
12 UIKit 0x00000001864cec58 _UIApplicationHandleEventQueue + 8500
13 CoreFoundation 0x00000001834c7044 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 24
14 CoreFoundation 0x00000001834c63a0 __CFRunLoopDoSources0 + 256
15 CoreFoundation 0x00000001834c4638 __CFRunLoopRun + 632
16 CoreFoundation 0x00000001834056d0 CFRunLoopRunSpecific + 452
17 GraphicsServices 0x00000001890e9c0c GSEventRunModal + 168
18 UIKit 0x0000000186536fdc UIApplicationMain + 1156
19 ******* 0x0000000100097858 main (main.m:16)
20 libdyld.dylib 0x000000018ffffaa0 start + 4